[Sugar-devel] Speak answering maths questions
Hi all,
*About*
This email is asking for feedback on different alternatives of implementing
a feedback request. It also goes through a lot of thought processes that
have resulted in my preferred suggestion.
This is mainly addressed at Sugar devs, but thought Alastair Grant from
Wellington this morning might be interested.
*Background = User story*
This morning while we were testing with some parents, the question came up
whether Speak could respond to maths problems, e.g. if you entered 10+2,
would speak respond with 12?
*First thoughts*
I thought this was quite a neat suggestion and have encountered a few ways
to implement it. To start with, I thought a smart way to indicate that you
wanted Speak to tell you an answer would be to use the equals sign after
maths. That leads to a construction like this:
if text.rstrip()[-1:] == '=':
try:
text = str(eval(text.rstrip()[:-1]))
except:
# SyntaxError is called when eval can't handle the input,
# but I think we should obscure all errors
pass
We need to convert the result of the eval to a string because speaking seems
to get confused when it encounters an integer. The practical result of the
code above is to produce results similar to this below:
text = '3+4= '
str(eval(text.rstrip()[:-1]))
'7'
One problem with this approach is integer division. Speak I am not quite
sure yet how to simply convert all integers within text to floats and keep
things succint snappy. I thought it would be better to bring something
back to the list and have a chat about trade offs.
Also, what do people think about the risks of exposing eval() to users? My
thoughts are that as we're forcing an '=' to be at the end of the string, it
will always result in SyntaxErrors. if something dangerous is attempted to
be evaluated.
eval('str')
type 'str'
vs.
eval('str=')
Traceback (most recent call last):
File stdin, line 1, in module
File string, line 1
str=
^
SyntaxError: unexpected EOF while parsing
Even so, is there a simple way to expose mathematical operators but prevent
calls to functions methods?
*Where to implement?*
The easiest place for the user would be to be agnostic of mode [1]. E.g.
whenever an equals sign appears at the end, try to answer the maths and say
the result.
it is very easy to tel someone 'add an equals sign at the end'. However,
since we have a Robot mode, it's probably best to throw it in there [2].
However, it's probably best for code maintenance to put the evaluation in
the 'brain.py', rather than in the voice, so that's where solution [3] puts
it.
[1] activity.py trunk:377
Will evaluate maths problems agnostic of mode:
def _entry_activate_cb(self, entry):
# the user pressed Return, say the text and clear it out
text = entry.props.text.rstrip()
maths_problem = False
if text:
self.face.look_ahead()
# solve the maths problem
if text[-1:] == '=':
try:
text = str(eval(text[:-1]))
maths_problem = True
except:
pass
# speak the text
if self._mode == MODE_BOT and not maths_problem:
self.face.say(
brain.respond(self.voices.props.value, text))
else:
self.face.say(text)
[2] activity.py trunk:377
Will evaluate maths only if we're in robot mode
def _entry_activate_cb(self, entry):
# the user pressed Return, say the text and clear it out
text = entry.props.text.rstrip()
if text:
self.face.look_ahead()
# speak the text
if self._mode == MODE_BOT:
if text[-1:] == '=':
try:
text = str(eval(text[:-1]))
except:
self.face.say(text)
self.face.say(
brain.respond(self.voices.props.value, text))
else:
self.face.say(text)
[3] brain.py trunk:66:
Moving the logic from [2], to the brain of the program.
def respond(voice, text):
if text.rstrip()[-1:] == '=':
try:
text = str(eval(text.rstrip()[:-1]))
except:
pass
if _kernel is None:
return text
else:
return _kernel.respond(text)
*Summary*
I personally prefer [1] because it means that you don't need to change
modes. However, that does mean we're overloading the default speech mode. If
there's no support, then [3] is probably be the best way to keep logic in
the right place.
Thanks
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Re: [Sugar-devel] Support for EPUB with Read in sugar-jhbuild?
Sayamindu,
I'm still working on my e-book book and not being able to read EPUBs
in Read under sugar-jhbuild has become a blocker for me. I'm trying
to figure out what's wrong but print statements don't seem to ever
come out. The only clue I've got is the stack trace I already sent to
you.
The code that runs the method that's failing looks like this:
mimetype = mime.get_for_file(filepath)
if mimetype == 'application/epub+zip':
if not _EPUB_SUPPORT:
self.close()
self._epub = True
self._setup_epub_viewer()
self._document = epubadapter.EpubDocument(self._view,
filepath.replace('file://', ''))
else:
self._setup_evince_viewer()
try:
self._document = evince.factory_get_document(filepath)
except GError, e:
_logger.error('Can not load document: %s', e)
return
I don't know what self.close() does. It isn't enough to stop the
lines following from running and failing.
I did notice one odd thing. epubpadapter.py is in the same directory
as readactivity.py, but epubadapter does an import of epubview and
that file is NOT in the same directory, but in a subdirectory called
epubview. So that might be someting.
James Simmons
On Mon, Apr 26, 2010 at 3:04 PM, Sayamindu Dasgupta sayami...@gmail.com wrote:
On Mon, Apr 26, 2010 at 1:12 AM, James Simmons nices...@gmail.com wrote:
Sayamindu,
I installed pywebkitgtk on Fedora 11 and I still get this when trying
to read an EPUB using sugar-jhbuild:
Traceback (most recent call last):
File
/home/jim/sugar-jhbuild/install/lib/python2.6/site-packages/sugar/activity/activity.py,
line 437, in __canvas_map_cb
self.read_file(self._jobject.file_path)
File
/home/jim/sugar-jhbuild/install/share/sugar/activities/Read.activity/readactivity.py,
line 595, in read_file
self._load_document('file://' + self._tempfile)
File
/home/jim/sugar-jhbuild/install/share/sugar/activities/Read.activity/readactivity.py,
line 796, in _load_document
self._setup_epub_viewer()
File
/home/jim/sugar-jhbuild/install/share/sugar/activities/Read.activity/readactivity.py,
line 760, in _setup_epub_viewer
self._view = epubadapter.View()
NameError: global name 'epubadapter' is not defined
This looks pretty much like what I was getting yesterday before I
installed pywebkitgtk.
James Simmons
This is quite odd - it works fine for me. Read uses git submodules,
but epubadapter.py is not a part of any submodule. Could you check if
the epubadapter.py is getting installed or not ?
Thanks,
Sayamindu
On Sun, Apr 25, 2010 at 11:56 AM, Sayamindu Dasgupta
sayami...@gmail.com wrote:
Hi,
On Sun, Apr 25, 2010 at 8:51 AM, James Simmons nices...@gmail.com wrote:
I'm doing another FLOSS Manual on e-books and Sugar and one of the
things I'd like to do is get some screen shots of the Read Activity
reading an EPUB e-book. I modified Get Internet Archive Books to
download EPUBs and that seems to work OK, but when I try to launch
Read on one of them it fails to start and complains of a missing
adapter. As I remember it, EPUB support depended on something called
webkit, something like that, that was an alternative to gecko. There
was some discussion here on whether we should support both that and
gecko. So I have two questions:
1). How do I get Read as delivered by sugar-jhbuld to work with EPUBs?
2). Does Read support EPUBs on SoaS right now? If not, what are our
future plans regarding EPUB support?
Read should be able to render EPUB files if pywebkitgtk is installed.
Thanks,
Sayamindu
--
Sayamindu Dasgupta
[http://sayamindu.randomink.org/ramblings]
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Re: [Sugar-devel] Speak answering maths questions
Hi Tim, I'd suggest looking at the parsing logic in the Calculate activity -- it deals with the same problems. - Chris. -- Chris Ball c...@laptop.org One Laptop Per Child ___ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel
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Yes, you can access the DOM from python. Google for extra info. If you can't find anything, I did something similar in my last year's project, which you can find here http://git.sugarlabs.org/projects/browse/repos/lucians-ssb/trees/master Look at usercode.py On 29 May 2010 11:26, Stefan George stefan.geo...@genesisware.com wrote: Hi, I would like to load a Website into the WebView(). This Website has some Javascript that manipulates the dom after loading the website. Do I get this manipulated dom If I get the dom wv.get_dom_window() to proceed it with python? Would that be possible? My Idea is to use the readability (http://lab.arc90.com/experiments/readability/ http://lab.arc90.com/experiments/readability/ ) script this way. To load a website with readability and extract the converted HTML into python. Thanks for your replies, Stefan ___ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel ___ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel
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